How do I do an update on a join where the value is based on the joined table, e.g. something like
UPDATE t1 SET t1.c1 = CONCAT(t1.c2, t2.c3) FROM t2 WHERE t1.id=t2.id AND t2.c1 IS NULL; I've had trouble using DBIC and had to resort to a custom, hackish `update_from` method, but before I do any further work to turn it into a generic DBIC component for CPAN, is there already a way to do this with existing DBIC or add-ons for DBIC? FWIW, I'm using Postgres but as far as I know most databases handle UPDATE FROM syntax (with the exception of MySQL, unsurprisingly, which uses UPDATE JOIN).
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